PCNSE Deploy and Configure Firewalls Practice Question
An administrator wants to ensure that all traffic from the internal network to the internet uses a specific public IP address for source NAT. There are multiple public IP addresses available. What is the best way to achieve this?
⚠ Common exam trap
A common mix-up: candidates confuse a NAT IP pool (which distributes traffic across multiple IPs) with a DIPP policy that uses a single IP, leading candidates to incorrectly select option A or D when the requirement is to use a specific single public IP.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a dynamic IP and port (DIPP) NAT policy with the specific IP as translated address
A Dynamic IP and Port (DIPP) NAT policy allows you to specify a single translated address (the specific public IP) while still performing port address translation (PAT) to handle multiple internal sessions. This ensures all outbound traffic uses that exact public IP, unlike a pool which would distribute across multiple IPs. DIPP is the standard method for source NAT with a single IP when many internal hosts need concurrent internet access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configure a NAT IP pool
Why it's wrong here
An IP pool uses multiple addresses, not a single specific one.
- ✗
Use a static NAT policy
Why it's wrong here
Static NAT maps a specific internal IP to a specific public IP, not suitable for all traffic.
- ✓
Create a dynamic IP and port (DIPP) NAT policy with the specific IP as translated address
Why this is correct
DIPP NAT can use a specific public IP address for source NAT.
- ✗
Use a PAT pool
Why it's wrong here
A PAT pool also uses multiple addresses.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PCNSE practice question is part of Courseiva's free Palo Alto Networks certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PCNSE exam.